Web supply mechanism for printing presses



March 25, 1941. H. M. BARBER I 2235164 I WEB SUPPLY MECHANISM FOR PRINTING PRESS ES- I Filed Feb, 21, 1959 W W I INVENTOR ATTORNEYS V Patented Mar. 25, 1941 Howard M. Barber, Pawcatnck, Conn., minor to C. B. Cottrell a Sons Company, Westerly, B. 1., a corporation of Delaware Application February 21, 1939, Serial No. 257,584

10 Claims.

This invention relates to web supply mechanisms of the automatic roll replenishing or flying pester type where the expiring roll web is pasted to the replenishing roll web without stopping the operation or the press. a

The object of this invention, broadly. is to provide means whereby an automatic web roll replenisher may be used in connection with a web fed printing press oi the flat sheet delivery type.

The object of my invention, more specifically, is to provide a traveling web controlled means for synchronizing the operation of the web roll replenisher with the operation of the sheet cutters whereby the cutters will cut off the sheet from l the web at a, point spaced from the tree or unpasted tail end oi the expiring web.

expiring web and the replenishing web necessarily leaves a tree or unpasted tail end as the expiring web is severed irom its roll. Where the operation 01 the web roll replenisher is not synchronized with respect to the sheet cutters oi the press the sheet cutters often out the sheet from the web at the tree or unpasted tail end beyond the pasted joint, thereby leaving a loose piece of paper which tends to choke the cutters and interfere with the piling of the sheets. It is to obviate this condition that the present in.- ventlon is directed.

30 A practical embodiment of my invention is represented in the accompanying drawing,- in which Fig. 1 represents in detail side elevation so much of a web printing press of the hat sheet 35 delivery type as will illustrate the application of my invention thereto;

I Fig. 2 represents a diagrammatic viewoi the means for synchronizing the operation or the dying pester oi the web roll replenishing mechanism with the sheet cutters of the printing press;

. Fig. 3 represents a detail view showing the pasted joint between the expiring roll web and the replenishing roll web after the expiring web has been severed from its roll. I,

The expiring web roll is denoted by W and the replenishing web roll by W. 'The coasting rotary cutters oi the web led flat sheet delivery printing press are denoted by l, 2, and their knives by 3, i. The coacting rollers :5. t serve 50 to direct the web between the sheet collecting rotary carrier 7 and its pressure roll 8.- This sheet collecting rotary carrier 7 is herein shown as being provided wlththree sets oi equally spaced grippers 9.

55 The sheet transfer rotary carrier is is=herein shown as provided with two sets of equally spaced sets of grippers H which coact with every second set of grippers 9 on the sheet collecting rotary carrier I to take a collected group of sheets therefrom.

The horizontally disposed flat sheet traveling endless delivery carrier I2 is shownas provided with a plurality of equally spaced grippers i3 arranged to take the collected groups of sheets from successive grippers I l oi the sheet transfer 10 rotary carrier l9. a

A sheet tail end engaging mechanism id of any well known or approved form is shown for taking the groups of sheets from the grippers i3 0! the endless delivery carrier I2 and depositing 15 them hat on the delivery pile l5.

The web roll replenishing mechanism may be 01' any well known or approved form, that shown herein comprising a, rotatable frame suitable for supporting three web rolls and for bringing them 2.0 successively into their pasting and replenishing position. It is to be understood that the paste may be applied in the usual manner to the sur face 0! the replenishing web roll W, and that the roll may be rotated in the usual manner, not shown herein, for bringing the roll up to the desired speed and for bringing the paste appliedportion around into position to be pasted to the expiring web W as the web is severed from its roll.

The paster comprises the pressure applying brush." carried by the spring pressed lever it which normally holds the brush in its retracted position to permit the web W to ireely pass to the press spaced from the periphery of the replenlshing roll which carries the web W. 1

The web severing knife |8'is carried by the spring pressed lever is which normally holds the knife out of its operative, position.

' The means which I have shown for synchrot0 nizing the operation oi the web replenishing mechanism with respect to the operation of the coasting rotary cutters I. 2 or the press may be electrically operated, and comprises the following elements: A light responsive device, such as a photoelectric unit 20 is arranged in position. to be operated by a broken line 2| printed lengthwise on the traveling'web. The space between the lines which operate the light responsive device will be slightly in excess 0! the free tail end oi the expiring web beyond the Joint which unites it to the replenishing web. Y

The main circuit A, A"'passes throughthe light responsive device 20 and it is provided with a handswitch 22. This main circuit A, A passes 66 through a rotary switch B comprising two discs 23, 24 and two arms 25, 26, the face of the disc 24 having a short conducting portion 21 electrically.

A switch 29 is operated by one arm of the.

spring pressed rock lever I9 which also carries the expiring web severing knife I8. An electromagnet 30 controls the operation of the switch 29 and also the operation of the web severing knife I8. An electromagnet 3| controls the operation of the brush depressing lever I1. These electromagnets 39 and 3| are connected in parallel and they are under the control of a second rotary switch C which comprises two discs 32, 33 coacting with their respective arms 34, 35 of the switch. The face of the rotary disc 33 is provided with a short conducting portion 36 electrically connected to the disc 32 by a wire 32* and contacting with the arm 35 of the switch every rotation of the shaft 28.

An electromagnet 31 is located on the relay 38 and an electromagnet 39 is located on the relay 40.

Means are provided for automatically moving the light responsive device along the web to coinpensate for varying web speeds, said means being positively driven from the press or delivery. In the present instance this compensating means comprises a governor 4I driven through the bevel gears 42, 43, which governor operates one arm of a rock lever 44, the other arm of which lever is connected by a rod 45 to a slide 46 on which the light responsive device 20 is mounted to travel parallel to the travel of the web. As the speed of the traveling web increases the governor will act to move the light responsive device 20 along the web against its direction of travel, thereby making the operation of the light responsive device enough earlier to bring the pasted joint in correct relationship with respect to the cut. The time for starting the pasting operation is thus automatically regulated after the hand switch 22 has been closed. This switch should be held closed a long enough period for the circuit A, A to be completed through the light responsive device'20 and the rotary switch B.

When it is desired to paste the web of the expiring roll to the advance end of the web of the replenishing roll the discs 23, 24 and 32, 33 of the electric rotary switches D and C are brought into engagement with the replenishing roll W in a predetermined relationship to the key 4'I.of the shaft 28 by well known or approved means not shown herein.

The rotation of the replenishing roll W to bring its paste carrying surface-into position to be engaged by the web of the expiring roll W by the paster brush I6 will, at the same time, rotate the discs 23, 24 and 32, 33 of the two rotary switches coincidently therewith. In the meantime the hand switch 22 has been closed. When the replenishing web roll W and thesheet cutters I, 2, have arrived at positions which will insure the pasting together of the webs at a point which will cause the cutters to miss the free or unpasted tail end of the expiring web roll the circuit A, A will be closed by the light responsive device and also by the rotary switch B. The closed circuit A, A will energize the magnet '31 of the relay 38 thereby closing the circuits D,D. The circuit D is the maintaining circuit for the relay 38 and it will thus keep the relay contacts closed until the circuit is opened at the switch 29 by the energization of the electromagnet 3| which controls the operation of the expiring web severing knife I8. The circuit D, when completed by the time rotary switch C, energizes the magnet 39 on the relay 40. The operation of the relay 40 closes the circuit E which is its own maintaining circuit, and also closes the circuit E which energizes the electromagnets 30, 3I. Electromagnet-3I controls the operation of the pressure applying brush I9 to push the expiring web against the paste applied surface of the replenishing web, at the proper time with respect to the press sheet cutters I, 2, to paste thetwo webs together. By theproper setting of the electromagnets 30' and 3I which are wired in parallel, the desired sequence of operation of the paster brush and web severing knife is obtained. After the joint has been pasted and as the expiring web is severed, switch 29 breaks the maintaining circuit D of relay 38. As this relay opens, the maintaining circuit E, at relay 40, is broken, allowing relay 40 to open. This will cause the deenergization of the electromagnets 30 and 3I, thus allowing the pressure applying brush I6 and the expiring web severing knife to spring back to their original non-operative positions.

The rotary switches B and C may then be silenced by unlocking their discs from the shaft 28 by any well known or approved means, not shown herein.

As a condition precedent to the operation of the synchronizing mechanism it must be borne in mind that the circumference of the web replenishing roll W must bear a differential or odd relationship to the length of the sheets out off by the sheet cutters I, 2. If the circumference of the replenishing roll was equal to an exact number of cut-offs by the cutters I, 2, and the paste happened to be applied to the replenishing roll in such a position that the cutters would cut through the free or unpasted tail end of the expiring roll this relationship would never change and the paster mechanism would never operate.

' It will be understood that the sequence of operations start with themovement of the pressure applying brush to force the expiring web against the replenishing web at its paste applied portion to form the pasted joint, and that this movement of, the brush cannot take place until the web controlled light responsive device operates to start the sequence of operations.

. It will also be understood that when once the parts are adjusted nothing will have to be readjusted so long as the replenishing rolls are of approximately the same circumference when brought into their replenishing position.

It is evident that various changes may be re- I sorted to in the construction, form and arrange- 2. Sheet cutters for a traveling web, means for joining web replenishing and expiring rolls on' the run, means for severing the expiring web beyondthe joint, leaving a free tail end; and

electric synchronizing means including a light responsive device tending to complete the circuit of the electric synchronizing means for preventing the cutters i'rom severing the said free tail end.

3. Sheet cutters for a traveling web, means for joining web replenishing and expiring rolls on the run, means for severing the expiring web beyond the joint, leaving a free tail end; and electric synchronizing means including a light responsive device operated by the traveling web to complete the circuit of the electric synchronizing means for preventing the cutters from severing the said free tail end.

4. Sheet cutters for a traveling web, means for joining web replenishing and expiring rolls on the run, means for severing the expiring web beyond the joint, leaving a free tail end; and electric synchronizing means including a light responsive device operated by a broken line on the traveling web to complete the circuit oi the electric synchronizing means for preventing the cutters from severing the said free tail end.

5. Sheet cutters for a traveling web, means for joining web replenishing and expiring rolls. on the run, means for severing the expiring web beyond the joint, leaving a tree tail end; traveiing web controlled electric synchronizing means including a light responsive device tending to complete the circuit obthe electric synchronizing means for preventing the cutters from severing the said free tail end, and means for automatically moving the light responsive devicealong the web to compensate for varying web speeds.

6. Sheet cutters for a traveling web, means for joining web replenishing and expiring rolls on the run, means for severlng'the expiring web beyond the Joint, leaving a free tail end; traveling web controlled electric synchronizing means including a light responsive device tending to complete the circuit 01 the electricsynchronizing means for preventing the cutters from severing the said free-tail end, and a positively operated governor for automatically moving the light re for joining web replenishing and expiring rolls on the run, means for severing the expiring web beyond the joint, leaving a tree tail end; electric synchronizing means including a light responsive device operated by the traveling web to complete the circuit of the electric synchronizing means for preventing the cutters from severing the said free tail end, and mean for automatically moving the light'responsive device along the web to compensate for varying web speeds.

8. Sheet cutters for a traveling web, means for joining web replenishing and expiring rolls on the run, means for severing the expiring web beyond the joint, leaving a free tail end; electric synchrog means including alight responsive device operated by the traveling web to complete the circuit of the electric synchronizing means for preventing the cutters from severing the said free tail end, and a positively operated governor for automatically moving the light responsive device along the web to compensate for varying web speeds.

9. Sheet cutters for a traveling web, means for joining web replenishing and expiring rolls on the run, means for severing the expiring web beyond the joint, leaving a free tail end: electric synchronizing means including a light responsive device operated by a broken line on the traveling web to complete the circuit of the electric synchronizing means for preventing the cutters from severing the said free tail end, and means for automatically moving the light responsive device along the web to compensate for varying web speeds. v

10. Sheet cutters for a traveling web, means for joining web replenishing and expiring rolls on the run, means for severing the expiring web beyond the joint, leaving a free tail end; electric synchronizing means including a light responsive device operated by a broken line on the traveling web to complete the circuit of the electric synchronizing means for preventing the cutters from severing the said free tail end, and a positively operated governor for automatically moving the light responsive device along the web to compensate for varying web speeds.

HOWARD M. BARBER. 

